Good call! I am going to call the first one 'Shogetsu' - flatter flowers than 'Shiro-fugen' and fimbriate (fringed) petal edges, also green leaves and exceedingly long pedicels. I'm sure the "moonlight through pines" name is because those stems are so long they look like pine needles. Do you have a tree photo to add to the posting? Those flowers are so beautiful when they're still pink. They will be very white very soon.

Second one is Prunus avium, sweet cherry. Identifying characteristics are the reflexed sepals and the leaf margins that are rounded on the edges, not serrated, and they're uneven. I mostly use the leaf edges to identify it on rootstock growth where there aren't even flowers. Your first photo shows that very clearly.
There is a wide range of sizes of avium flowers - species trees can be very variable, particularly since many of them are seedlings, and some are cultivars.

Spring Cherry( Akebono ) blossoms at South-East side of Minoru Oval Track, or west of the Aquatics and Arenas facilities. Flowers are lighter than in these photos. Background Red house in second photo is Minoru Aquatic Center.